Some sellers don't list the figures in the right category or they make a typo in the name. Meaning no one finds them as easily so you can get them for really cheap if you're lucky enough. I got a ML Phoenix for 8 bucks and the Invisible Woman from the big ML FF pack for 6 bucks because the seller spelled the names wrong

it helps to check the newly listed at different times of the day. I got a MOC Deadpool for $19.50 (BIN + S&H) last weekend because I happened to be on eBay at 2:00 PM on a Sunday afternoon. Won a MOC Phoenix for $18 total 15 minutes later. I couldn't believe it. Holiday weekends are good times to find deals - no one is usually at home surfing around eBay except for lonely shut-ins like me....